From: Dexuan Cui Date: Fri, 10 Feb 2017 21:18:46 +0000 (-0600) Subject: PCI: hv: Fix wslot_to_devfn() to fix warnings on device removal X-Git-Tag: v4.11-rc1~92^2~13^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=60e2e2fbafdd1285ae1b4ad39ded41603e0c74d0;p=platform%2Fkernel%2Flinux-exynos.git PCI: hv: Fix wslot_to_devfn() to fix warnings on device removal The devfn of 00:02.0 is 0x10. devfn_to_wslot(0x10) == 0x2, and wslot_to_devfn(0x2) should be 0x10, while it's 0x2 in the current code. Due to this, hv_eject_device_work() -> pci_get_domain_bus_and_slot() returns NULL and pci_stop_and_remove_bus_device() is not called. Later when the real device driver's .remove() is invoked by hv_pci_remove() -> pci_stop_root_bus(), some warnings can be noticed because the VM has lost the access to the underlying device at that time. Signed-off-by: Jake Oshins Signed-off-by: Dexuan Cui Signed-off-by: Bjorn Helgaas Acked-by: Haiyang Zhang CC: stable@vger.kernel.org CC: K. Y. Srinivasan CC: Stephen Hemminger --- diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index 3efcc7b..cd114c6 100644 --- a/drivers/pci/host/pci-hyperv.c +++ b/drivers/pci/host/pci-hyperv.c @@ -130,7 +130,8 @@ union pci_version { */ union win_slot_encoding { struct { - u32 func:8; + u32 dev:5; + u32 func:3; u32 reserved:24; } bits; u32 slot; @@ -485,7 +486,8 @@ static u32 devfn_to_wslot(int devfn) union win_slot_encoding wslot; wslot.slot = 0; - wslot.bits.func = PCI_SLOT(devfn) | (PCI_FUNC(devfn) << 5); + wslot.bits.dev = PCI_SLOT(devfn); + wslot.bits.func = PCI_FUNC(devfn); return wslot.slot; } @@ -503,7 +505,7 @@ static int wslot_to_devfn(u32 wslot) union win_slot_encoding slot_no; slot_no.slot = wslot; - return PCI_DEVFN(0, slot_no.bits.func); + return PCI_DEVFN(slot_no.bits.dev, slot_no.bits.func); } /*